John Jun-Tsung Tsay, M.D.
Internal Medicine Physician · Boston, MA
John Jun-Tsung Tsay, M.D. is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1164632691, issued on May 23, 2007. Check the license (Massachusetts 250564, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John Jun-Tsung Tsay
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 250564 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1400 Vfw Parkway, Boston, MA 02132
- Phone
- (857) 203-3000
- Enumerated
- May 23, 2007
- Record last updated
- Jan 28, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150629001906); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 1400 Vfw Parkway
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Teresa Corrigan, L.P.NLicensed Practical Nurse1801032982
- Mark Drinkwater, NPCritical Care Medicine Nurse Practitioner1033357124
- Jonlyn Glenn, FNP-CAdult Health Nurse Practitioner1376258061
- Nina Kilimnik, MS, NPAdult Health Nurse Practitioner1457445009
- Melissa ToulanNutritionist1588695076
Verify John Jun-Tsung Tsay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 250564Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
23 Medicare Part D claims for 15 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Atrius Health IncBoston, MA
- Hebrew Rehabilitation CenterBrookline, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
2,320 internal medicine physician records list a practice address in Boston
They are 2,320 of the 41,865 NPPES records with a practice address in Boston, and 6,825 internal medicine physician records in Massachusetts.
All 2,320 in Boston → All 6,825 in Massachusetts → Every provider in Boston →
Other internal medicine physician records in Massachusetts
- Nawal Aamir, MDWorcester, MA1588248926
- Nathan Abare, MDSpringfield, MA1386852747
- Nooshin Abbasi, MD MPHNewton, MA1831888353
- Taimur AbbasiBoston, MA1841673522
- Lauren Abbate, MDBoston, MA1922099621
- Bassima Abdallah, MDBoston, MA1912327305
- Maya Abdallah, MDBoston, MA1861854937
- Samah Abdallah, MDBrighton, MA1730814971
- Omar Abdel-Wahab, M.D.Boston, MA1023042777
- Mohab AbdelhalimBoston, MA1871388496
Common questions
What is John Jun-Tsung Tsay, M.D.'s NPI number?
John Jun-Tsung Tsay, M.D.'s National Provider Identifier (NPI) is 1164632691, issued on May 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Jun-Tsung Tsay, M.D. located?
The NPPES record lists a practice address at 1400 Vfw Parkway, Boston, MA, 02132. Phone: (857) 203-3000. Providers update this record themselves, so call before visiting.
How can I verify John Jun-Tsung Tsay, M.D.'s license?
NPPES lists Massachusetts license number 250564, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Jun-Tsung Tsay, M.D. prescribe under Medicare Part D?
In 2024, John Jun-Tsung Tsay, M.D. had 23 Medicare Part D claims for 15 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.